Can I know why you specifically want Yahoo Parking Feed?
I do know and I still manage a parking company that provides this but want bit more information that why you specifically want Yahoo Feed.
PS. Yahoo Feed comes via Bing now.
COOL!! which is your parking platform??
here are some info:
Domain Sponsor abandon yahoo feed years ago.. after a big clawback now they only have tier2 ads or zeroclick other that google feed obv.
Company with yahoo feed:
trafficz, ddc.com , parklogic, dotzup, smartnames and maybe some other that i've forgotten.
With yahoo feed you can request to be applied for arbitrage but they have really severe restrictions.
Yahoo tipically pay 10 time less than google.. but you can buy traffic so also domain with 0 traffic could be good.
arbitrage is a biz only for experts and only for few..
try it if you want but be careful there are many cheater around that say to provide you good traffic and is crappy instead.
There are many cheaters also here on namepros, i've lost many account for this cause, proceed with caution!
As i'm not expert i abandon that biz.. or better i abandon the idea to try to grow a biz in that direction LOL